Twin bushing puller



Sept. 9, 1952 M. CLAPS 2,609,597

TWIN BUSHING FULLER Filed July 24, 1947 Fig. 3

IN VEN TOR. /'7/C///l 2 cur/ 5 Patented Sept. 9, 1952 UNITED STATESPATENT 40PM 7 2,609,597 7 I a a Michael Claps, Denver, 0010. ApplicationJuly 24, 1947, Serial No. 763,206

This invention relates to bushing pullers and with the two-section formshown the stem secmore particularly to one which is adapted for thepulling of two bushings or equivalent members by one operation.

One of the objects of my invention is to pro- 2 Claims. (Cl. 29 265)duce a simple, inexpensive and efiicient bushing puller which isadaptedto simultaneously pull two axially spaced bushings or equivalentmembers of difierent size.

Another object is to produce a double bushing puller which employssimple pulling fingers not requiring resilient expansible means or otherexpensive structure. a V a r A further object is to produce a bushingpuller of the type described in whichis embodied insociated with fluidcouplings employed in automobile transmission systems.

Other objects of my invention will become apparent from the followingdescription taken in connection with the accompanying drawings showing,by way of example, a bushing puller embodying the invention.

In the drawings:

Figure 1 is a perspective view of the twin bushing puller;

Figure 2 is a side view of the bushing puller with parts in section andbroken away in order to show details ofconstruction;

I Figure 3 is a view showing the bushing puller in operation; and

Figure 4 is a detailed'side view of one of the pulling fingers.

Referring to the drawings in detail, the improved twin bushing pullerwhich I have disclosed by way of example as embodying my inventioncomprises a stem 1 made of two sections 2 and 3. The two sections areshown as of the same diameter and section 3 is provided with a reducedthreaded inner end 4 which is arranged to be screwed into a threadedbore 5 in the inner end of the section 2 to couple the sectionstogether. The outer end of this latter section 2 is formed with threads6 over a substantial portion of its length and cooperating with thisthreaded portion of the stem is an elongated nut I having a hexagonalsurface so that a wrench or other tool can be readily attached theretoto turn the nut. If desired, the two sections 2 and 3 of the stem may bemade as a single piece, but

angles to the longitudinal axis of tion -3 can be replaced by a similar,section of smaller or'larger" cross section to thereby condition th toolfor a more universal use as will become apparent.

Arranged for positioning on the smooth part of the stem are two bushingpulling fingers 8and 9 of like construction which are shown in detail inFigure 4. Each of these finger'son'its inner surface is provided with a'"longitudinally extending groove ID, the surface of which iscylindricvhaving a radius of curvature'the same as the cylindricalsurface of the stem. The outer surface of each finger has steppedcylindric surfaces II and H, the former having a greater radius ofcurvature than the latter'with both cylindric surfaces being concentricwith the cylindric surface of the groove l0.' The inner end of thelarger. cylindric surface ll has a shoulder I3 and the outer end of thesmaller cylindric surface, I2 has a shoulder l4. These shoulders areemployed toengage the end edges of the two bushings during therpullingthereof to be performed by the bushing puller. 'Adjacent the outer endof each finger having the larger cylindric surface there is provided aslot 15 which is slightly angular to aplane at right the finger as shownin various figures.

The twofingers 8 and 9 are both formed to be somewhat less than asemi-cylinderso that when they are placed together with their grooves 18in opposed relation, the shoulders 13 and [4 can be passedthroughthebushings to be pulled and which havean'internalradi us ofcurvature of the cylindric surfaces Ill and "I2. "With such anarrangement it is'seen that after the shoulders are passed-through thebushings and the fingers are moved-apartthe shouldersfcanbecome placedbehind the 'rear 'edges 'of the bushings. The previously referredtosteml provides the means for spreading the two pulling fingers after theyare inoperative positions and for additionally functioning to maintainsaid fingers is their operative position, as can bereadily seen fromFigures 1, 2 and 3.

The stem l is also employed for pulling 'the fingers in an axialdirection so that the bushings can be removed and this is accomplishedby means of a pin l6 extending transversely through the stem andextending from opposite sides of the stem so that it'canbe received inthe slots I5 of 'the pulling 'finger'sf' In order that the lingerscanflbe inaintained on the-stemwhen trates the tool being used inpulling two bushings simultaneously, there is shown ahousin structure 20in section. This housing structureis provided with a large bore 2i and asmaller bore 22 in axial alignment with and at the rear of the largerbore. Positioned in the inner ends of these two bores on suitable seatsare-bushings 23 and 24 which are employed to journal a shaftingsLthe'tW'o fingers of the. illustrated improved twin' bushingpullerarefirstfplaced together with their grooves .10 in opposed relation. Thefingers in thisrelationare then inserted through the open end of theouter larger bore 2| in the housin istructure after the shaft has beenremoved. The insertionis made test point where the shoulders l3 areslightly beyond the inner endsof the bushing 23. and the'shoulders [4are slightly beyond. the inner .lend of the bushing 24, The fingers arenow spreadapartan'd the stem l is insertedbetweehthe two fingersandthrough the grooves .lll so asto further spread the inner ends of thetwofingers apart. and maintain the various .shouldersbehind theb'ushings.with which they are to cooperate. The stem. is s'ol'inse'rted that .theends ofthepin l5 willpa'ssinto the 'spaces between the fingersMWhenthestem is inserted suificiently that the ends of} the 'pin'are oppositethe open. ends of the slots 15' in the fingers, the

stem is turne ds'oias to place'jthe endsof the pin 16 in the slots andthus" connect"thefingersto the stem. .'I he sleeve ll is then next" slidover the ends of the finger havingi'the' larger cylindric surface. Thepuller is now in condition for pulling the bushingsand, to accomplishthis all that needs "to. bedone isscrewup the nut 1,. The

hot will abut thebase portion ofv the bearing member I8 and the ends oftheextensions l9-will be broughtlinto bearingengagement with the housingstructure 20.. By applying a wrench to g the nut 1 l and 4 continuing toT turn it, it will be seen that the stem. willbe moved outwardly fromthe two bores in the housing. Since the fingers are connected to thestem by the bayonet joint connection comprising the pin and slots, thefingers also will be moved with the stem and consequently the shouldersl3 and I4 of each finger will engage behindthebushings and pull themoutwardlyirom their bores. p

. s sn neth to t e t ns n 1. .0 th

bearing member. should beef such, length that the bushings can be pulledoflf their seats in the bores. Also, each finger should be preferably designed so that the shoulders l4 thereof will engage the inner bushing 25slightly prior to the outer bushing 23 during the pulling operation.With such an arrangement, it will only be necessary to start one bushingoff its seat at a time and consequently less force will be necessary tobe applied to the stem by the nut l.

From the foregoing description of the details of my twin bushing pullerand the operation thereof, it is seen that a minimum number of parts isemployed to accomplish the simultaneous pulling of two bushings ofdifferent size. No springs are embodied in the bushing puller and thepulling fingers are designed to be independent members readilyinsertable in the bores having the bushing mounted therein. The fingersare easily. connectable to the pulling stem. If damage sebum occur toeither of the pulling fingers, anew pulling finger canbepurchased atasrnall costftorepair the tool. It willnot be necessary topurchaseiacorriplete newtc'ol. Also, by'co'n structing the stem in'twoparts,fp'art '3 'canbe removed at any time and be replacedby anotherpart similar, to 3 but havinga Slightly 511 1841161 or greater diameterat the outer end thereof. When such is done the tool can'be adapted jioruse'i'n pulling various sizes ofin'ner bushings 12d. 'In other Words,the extentto which the shoulders Hi can be'expended'can be varied bymerely fimploying several stem parts 3 of different cross-section forattachment to the part2 'of'theste'm Being aware of the possibility ofmodification in, the particular bushing puller shown by 'way of examplewithout separate from the fundamental principles of the invention; it isnot intended that the scope of the invention belirnited in any mannerexcept in accordance with the "appended claims.

What is claimed is; H V Y 1. In a bushing puller for'siinultai' eouslypulling two-axially spacedjb'ush'ingsof different diameters orequivalent elements positionedin a housing structure, like "independentpulling 'fin'gers each of which is made'as'a singleintegral'piece andprovided with longitudinally spaced shoulders for engaging the innerends of the'bushing to be pulled and also being so constructed that theshoulder means can be passedthrough the bushing with which said means isto engage," a'stem oi uniform diameter positionable between the fingersto maintain by direct engagement with the fingers the shoulder'meansthereof in" engagement with the bushingsjb'ayonet' jbintin'eans fordetachably connecting the "fingers to -the Stem by a rotation of thestem only afte rsaid stem is positioned between the fingers,,and meansincluding screw means cooperating with the'stem ior moving the fingersand. stem outwardly of the structure to th'ereby'shnultanecusly removethe bushings. 1

2. A punin 'fineer for use with a bus in puller rod having. aradiallyextendin pin 1&id finger comprising an elongated member provided with agroove having acylindriosurface for receiving the rod and twccuter g ldric w iters Qt d fe n radii of curvature. said outer sur flace. alsobeing provided w th a bu hi e es c e a i (References in following page)5 I 6 REFERENCES CITED Number Name Date The following references are ofrecord in the 11504550 smith 1924 file of this patent: iggggg s 1926 6ilson June 21, 1932 UNITED STATES PATENTS 5 2,257,318 Wilborn Sept. 30,1941 Number Name Date 2,317,405 Rutten Apr. 27, 1943 413,700 Wood Oct.29, 1889 2,421,324 Graham May 27, 1947 1,368,501 Huddle Feb. 15, 19211,424,261 Rudolph Aug. 1, 1922 FOREIGN PATENTS 1,479,583 Carey Jan. 1,1924 10 Number Country Date 1,496,303 Dieringer June 3, 1924 207,412Canada Jan-11, 1921

